pw_sys_io_stdio#

The pw_sys_io_stdio backend implements the pw_sys_io facade using stdio.

Why not just use stdio directly?#

The nice thing about using pw_sys_io is that it’s rather easy to get a board up and running with a target-specific backend. This means when drafting out a quick application you can write it against pw_sys_io and, with some care, the application will be able to run on both host and target devices.

While it’s not recommended to use pw_sys_io for any production applications, it can be rather helpful for early prototyping.

Setup#

This module requires relatively minimal setup:

  1. Write code against the pw_sys_io facade.

  2. Setup build system to point to this backend.

  • For GN, direct the pw_sys_io_BACKEND GN build arg to point here.

  • For Bazel, the default backend multiplexer will automatically pick this stdio backend for host builds. To use this backend on non-host platforms, add the @pigweed//pw_sys_io_stdio:backend constraint_value to your platform.

Module usage#

For the most part, applications built with this backend will behave similarly to an application built directly against stdio.

Dependencies#

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